CN106471347B - Rotary angle detecting device and power steering gear - Google Patents

Rotary angle detecting device and power steering gear Download PDF

Info

Publication number
CN106471347B
CN106471347B CN201580036669.9A CN201580036669A CN106471347B CN 106471347 B CN106471347 B CN 106471347B CN 201580036669 A CN201580036669 A CN 201580036669A CN 106471347 B CN106471347 B CN 106471347B
Authority
CN
China
Prior art keywords
holding member
magnetic
claw
deposition
component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201580036669.9A
Other languages
Chinese (zh)
Other versions
CN106471347A (en
Inventor
吉田治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Publication of CN106471347A publication Critical patent/CN106471347A/en
Application granted granted Critical
Publication of CN106471347B publication Critical patent/CN106471347B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021—Determination of steering angle
    • B62D15/0215—Determination of steering angle by measuring on the steering column
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0421—Electric motor acting on or near steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0442—Conversion of rotational into longitudinal movement
    • B62D5/0454—Worm gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Steering Mechanism (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

A kind of rotary angle detecting device and power steering gear are provided, the deformation of detection part is able to suppress, can be improved detection accuracy.By deposition plate, deposition is fixed each other with yoke in the state of clamping a pair of magnetic yoke using deposition plate and yoke.

Description

Rotary angle detecting device and power steering gear
Technical field
The present invention relates to rotary angle detecting device and power steering gears.
Background technique
Previous rotary angle detecting device has the permanent magnet that rotates relative to one another and a pair of magnetic yoke, to using permanent magnet and The relative rotation of a pair of magnetic yoke and a pair of of ring concentrator that the magnetic flux generated between a pair of magnetic yoke is incuded and detection ring concentrator Between magnetic flux Hall IC sensor.As a pair of magnetic yoke of detection part and a pair of of ring concentrator by resist permalloy etc. Soft-magnetic body is formed, and can be integrated by insert injection moulding forming with the bracket of resin, and be fixed on via bracket input it is defeated Shaft or shell.It describes in patent document 1 and is related to an example of above explained technology.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2008-180518 bulletin
Summary of the invention
The technical problems to be solved by the invention
But in the above prior art, there are the following problems, i.e., because can lead along with the cooling meat of insert part forming The inside of detection part is caused to generate internal stress, so detection part deformation is to make resist permalloy due to magnetic loss Magnetic hysteresis increases, and detection accuracy is caused to reduce.
The object of the present invention is to provide a kind of deformation for being able to suppress detection part, it can be improved the rotation of detection accuracy Rotation angle detecting apparatus and power steering gear.
For solving the means of technical problem
In the rotary angle detecting device of an embodiment of the present invention, the first holding member and the second holding member are being utilized By the first holding member, deposition is fixed each other with the second holding member in the state of clamping detection part.
Invention effect
Therefore, in the present invention, it is able to suppress the deformation of detection part, can be improved detection accuracy.
Detailed description of the invention
Fig. 1 is the overall structure figure of the electric power steering device of embodiment 1.
Fig. 2 is the longitudinal sectional view of the steering box 16 of embodiment 1.
Fig. 3 is the exploded perspective view of yoke assembly.
Fig. 4 is the plan view of yoke 23.
Fig. 5 is the enlarged view of the main part of Fig. 3.
Fig. 6 A is the perspective view of deposition plate 29.
Fig. 6 B is the plan view of deposition plate 29.
Fig. 7 is the enlarged view of the main part of Fig. 6 A.
Fig. 8 is the cross-sectional view of protrusion 30.
Fig. 9 is the exploded perspective view of ring concentrator component.
Figure 10 is the plan view of ring concentrator bracket 26.
Figure 11 is the enlarged view of the main part of Fig. 9.
Figure 12 A is the state for indicating the burr generated when having carried out ultrasonic wave coating to ring concentrator bracket 26 and deposition plate 29 Figure.
Figure 12 B is the state for indicating the burr generated when having carried out ultrasonic wave coating to ring concentrator bracket 26 and deposition plate 29 Figure.
Specific embodiment
(embodiment 1)
Firstly, illustrating structure.
[electric power steering device]
Fig. 1 is the overall structure figure of the electric power steering device of embodiment 1.
The steering input that driver inputs to steering wheel 1 is as rotary motion via steering shaft (second component, input shaft) 2, torsion bar 3, pinion shaft (first component, output shaft) 4 are transferred to the first pinion gear 5, small with the first pinion gear 5 by having The rack gear 6 of first rack tooth 6a of gear teeth 5a engagement is converted to linear motion.The linear motion of rack gear 6 is via drag link 7,7 It is transmitted to deflecting roller 8,8.By steering shaft 2, torsion bar 3, pinion shaft 4, the first pinion gear 5, rack gear 6 and drag link 7,7, constitute The steering operation of steering wheel 1 is transferred to the steering mechanism 9 of deflecting roller 8.
On the other hand, the output of electric motor 10 is transferred to via the speed reducer 11 being made of worm shaft 11a and worm gear 11b Second pinion gear 12 is converted to the straight of rack gear 6 via the second rack tooth 6b engaged with the pinion gear teeth 12a of the second pinion gear 12 Line movement.Second pinion gear 12 is integrated with worm gear 11b setting.Electric motor 10 is such as 3-phase brushless motor, according to coming from The command signal of motor control circuit 15, which applies steering mechanism 9, turns to power-assist power.
In steering shaft 2, it is provided with the torque sensor (rotation angle of the relative rotation of detection steering shaft 2 and pinion shaft 4 Detection device) 13.
Motor control circuit 15 from the output signal of torque sensor 13 based on finding out in steering shaft 2 and pinion shaft 4 Between the driving status such as the steering torque that generates and speed, the command signal that operation is issued to electric motor 10, and this is referred to Signal is enabled to export to electric motor 10.
Fig. 2 is the longitudinal sectional view of steering box 16.
Steering box 16 has gear box casing (shell) 17.Steering shaft 2 and pinion shaft 4 are relative to gear box casing 17 are rotated centered on same rotary shaft O.Hereinafter, x-axis is taken on the direction of rotary shaft O, relative to pinion shaft 4, to turn to 2 side of axis is forward direction.Gear box casing 17 is had the axis incorporating section 17a configured using rotary axis direction as length direction, received from the axis The guide part incorporating section 17b that the portion 17a that receives extends out to vehicle rear side with relative to the orthogonal setting of axis incorporating section 17a and big Show the rack gear incorporating section (illustration omitted) that vehicle-width direction is length direction configuration.It should be noted that axis incorporating section 17a, guide part incorporating section 17b and rack gear incorporating section are all cylindrical shape.
In axis incorporating section, 17a is accommodated with a part of steering shaft 2 and torsion bar 3, pinion shaft 4 and torque sensor 13.It turns round Bar 3 is in a manner of being unable to relative rotation to the hollow portion 2a insertion for being set to negative direction of the x-axis end of steering shaft 2.The x-axis of torsion bar 3 Negative direction end is chimeric with 4 spline of pinion shaft.Steering shaft 2 can rotatably be supported on gear box casing 17 by bearing 18a.Small tooth The x-axis direction both ends of wheel shaft 4 can rotatably be supported on gear box casing 17 by bearing 18b, 18c.
Rack gear 6 is accommodated in rack gear incorporating section.
In guide part incorporating section 17b, it is accommodated with substantially in a manner of it can be moved axially along guide part incorporating section 17b The rack gear guide part 19a of cylindrical shape.Moreover, having screwed togather the cover 19b in the end of the open side of guide part incorporating section 17b.? The rack bar side of rack gear guide part 19a is equipped with the sheet material 19c of abrasion for preventing rack gear guide part 19a etc..
[torque sensor]
Torque sensor 13 has multipole magnet (magnetic part) 20, a pair of magnetic yoke (detection part) 21,22, yoke (the first holding member) 23, a pair of of ring concentrator (detection part) 24,25, ring concentrator bracket (the first holding member) 26 and Hall IC Sensor (Magnetic Sensor) 27.Multipole magnet 20, a pair of magnetic yoke 21,22, yoke 23, a pair of of ring concentrator 24,25 and collection magnetic Ring support 26 is configured on the circle concentric with rotary shaft O.
Multipole magnet 20 makes 16 magnetic poles (pole N, the pole S are respectively identical number of poles) circumferentially, equally spaced alternately magnetic The permanent magnet of cylindrical shape.Multipole magnet 20 is fixed on pinion shaft 4 via magnet holder 28.Magnet holder 28 is formed to have The cylindrical shape of large-diameter portion 28a and small diameter portion 28b.Large-diameter portion 28a is fixed on the periphery at the positive direction of the x-axis end of pinion shaft 4.It is small Diameter portion 28b is located at the positive direction of the x-axis side of large-diameter portion 28a, the inner circumferential of fixed multipole magnet 20.
A pair of magnetic yoke 21,22 is formed by resist permalloy (non-retentive alloy), as shown in figure 3, having 8 claws 211,221 and annular portion 212,222.Claw 211,221 in a manner of surrounding the periphery of multipole magnet 20, on the same circumference every Specified gap be alternately arranged, between multipole magnet 20 have regulation radial clearance it is opposed.Annular portion 212,222 It is there is regulation radial clearance each other opposed in the positive direction of the x-axis side of claw 211,221.It should be noted that a pair of magnetic yoke 21, it 22 is configured as in the case where not applying the steering neutral condition of torque to steering shaft 2 and pinion shaft 4, before claw 211,221 It is directed toward the pole N of multipole magnet 20 and the boundary of the pole S in end.
Yoke 23 is shaped generally as type shape by thermoplastic resin, keeps a pair of magnetic yoke 21,22.Yoke 23 It is fixed on steering shaft 2.
A pair of of ring concentrator 24,25 is formed as C-shape by resist permalloy, has defined radial gap each other, The middle position of the radial clearance of the annular portion 212,222 of magnetic yoke 21,22 is configured with two magnetic yokes 21,22 with contactless state.
Ring concentrator bracket 26 is formed as tubular by thermoplastic resin, keeps a pair of of ring concentrator 24,25.Ring concentrator bracket 26 is solid Due to gear box casing 17.
Hall IC sensor 27 has Hall element 27a and circuit substrate 27b, detects the diameter in a pair of of ring concentrator 24,25 The density of the magnetic flux generated into gap.Hall element 27a in the middle position of the radial gap of a pair of of ring concentrator 24,25, with Two ring concentrators 24,25 are configured with contactless state.Circuit substrate 27b is in the positive direction of the x-axis side of ring concentrator bracket 26 and Hall member Part 27a connection.The electric power of battery from vehicle is supplied via circuit substrate 27b to Hall element 27a, Hall element 27a Output export via circuit substrate 27b to motor control circuit 15.
Hereinafter, the structure of each section for constituting torque sensor 13 is described in detail.
[yoke assembly]
Fig. 3 is the exploded perspective view of yoke assembly, and Fig. 4 is the plan view of yoke 23, and Fig. 5 is the major part of Fig. 3 Enlarged drawing.
Yoke assembly has a pair of magnetic yoke 21,22, yoke 23 and deposition plate (the second holding member) 29.By deposition plate 29 and yoke 23 constitute holding member.
First magnetic yoke (the first magnetic yoke component) 21 has 8 the first claws 211 and the first annular portion 212.First claw 211 For plate-shaped member, front end is formed as the thin shape in front end.First annular portion 212 is formed as annulus in a manner of surrounding rotary shaft O Shape.Each first claw 211 has the first bending section 211a from from the first annular portion 212 to radially inner direction extension and from first The first test section 211b that bending section 211a is extended along the x-axis direction in the mode opposed with multipole magnet 20.Each first bending section 211a is configured as rectangular relative to rotary shaft O.Each first test section 211b is configured as the radiation side relative to rotary shaft O To rectangular.
Second magnetic yoke (the second magnetic yoke component) 22 has 8 the second claws 221 and the second annular portion 222.Second claw 221 It is plate-shaped member, front end is formed as the thin shape in front end.Second claw 221 has x-axis direction identical with the first claw 211 long Degree.Second annular portion 222 is formed as circular in a manner of surrounding rotary shaft O.Second annular portion 222 is set to diameter than The diameter of one annular portion 212 is small.Each second claw 221 has second extended from the second annular portion 222 to radially outer direction Bending section 221a and the second test section extended along the x-axis direction in the mode opposed with multipole magnet 20 from the second bending section 221a 221b.Each second bending section 221a is configured as rectangular relative to rotary shaft O.Each second test section 221b is configured as relatively In rotary shaft O radiation direction at right angles and be alternately arranged between first adjacent test section 211b, 211b.
Yoke 23 has main part 231, the first through hole 232, the first incorporating section 233, the second through hole 234 and the Two incorporating sections 235.Main part 231 has small diameter portion 231a, large-diameter portion 231b and mounting surface 231c.Small diameter portion 231a has and turns The internal diameter substantially uniform to the outer diameter of axis 2, and it is fixed on the periphery of steering shaft 2.Large-diameter portion 231b is set to diameter than small The diameter of diameter portion 231a is big, and in the claw 211,221 of the first magnetic yoke 21 of internal storage and the second magnetic yoke 22.Mounting surface 231c It is set as substantially vertical with rotary shaft O, small diameter portion 231a is connected with large-diameter portion 231b.On mounting surface 231c, mounting first First annular portion 212 of magnetic yoke 21 and the second annular portion 222 of the second magnetic yoke 22.First through hole 232 is formed as making the first inspection Survey portion 211b penetrates through mounting surface 231c.First incorporating section 233 is arranged to continuous with the first through hole 232 and towards radial outside Extend, and be formed as concavity in a manner of towards mounting surface 231c side opening, stores the first bending section 211a.Second through hole 234 are formed as that the second test section 221b is made to penetrate through mounting surface 231c.Second incorporating section 235 is set as connecting with the second through hole 234 Continue and extend to radially inner side, and be formed as concavity in a manner of towards mounting surface 231c side opening, stores the second bending section 221a。
Mounting surface 231c is provided with recess portion 236 and wall portion 237.Recess portion 236 is circumferentially, equally spaced arranged 8.Recess portion 236 are made of internal diameter side section 236a and radial extension 236b.Internal diameter side section 236a is formed in the diameter of the first through hole 232 Inwardly, and circumferentially.The radial width of internal diameter side section 236a is formed as than the inner peripheral of mounting surface 231c to outer The half of the width of periphery is small.Radial extension 236b is from the circumferential both ends of internal diameter side section 236a towards radial outside side It is arranged by way of between the first through hole 232 and the second through hole 234.Recess portion 236 has and 29 deposition of deposition plate Bottom 238, and by towards 29 side of deposition plate (positive direction of the x-axis side) opening in a manner of formed.Bottom 238 is formed as and x-axis Orthogonal planar in direction.
Wall portion 237 is arranged in a manner of surrounding the complete cycle of opening edge along the opening edge of recess portion 236, and wall portion 237 is formed as it X-axis direction distance between deposition plate 29 than the x-axis direction between bottom 238 and deposition plate 29 apart from short, also, by magnetic When yoke bracket 23 and deposition plate 29 have carried out deposition fixation, do not abutted with deposition plate 29.Wall portion 237 has rake 239, this inclines Inclined portion 239 is tilted in a manner of increasing the opening area of recess portion 236 towards opening edge side from bottom 238.
Fig. 6 A is the perspective view of deposition plate 29, and Fig. 6 B is the plan view of deposition plate 29, and Fig. 7 is the major part amplification of Fig. 6 A Figure.
Deposition plate 29 is kept a pair of magnetic yoke 21,22 by abutting with bending section 211a, 221a of a pair of magnetic yoke 21,22 Between yoke 23 and deposition plate 29.Deposition plate 29 configures on the circle concentric with rotary shaft O.Deposition plate 29 is by thermoplasticity Resin is formed to have the inner circumferential diameter bigger than the small diameter portion 231a of yoke 23 and has the periphery smaller than large-diameter portion 231b The annulus shape of diameter.4 notch 29a are formed in the outer peripheral edge of deposition plate 29.When on the defined straight line by rotary shaft O When defining y-axis, notch 29a is about the y-axis symmetrically each configuration 2 in left and right.Positioned at the left and right side of y-axis 2 notch 29a, Angle between 29a is 45 °.The left and right other side of y-axis is also identical.The face of the positive direction of the x-axis side of deposition plate 29 is formed as Flat, on the face of negative direction of the x-axis side, circumferentially, equally spaced it is provided with 8 protrusions 30.
Protrusion 30 melts to melt yoke 23 with deposition plate 29 in the state of abutting front end with bottom 238 It applies.Protrusion 30 is formed as opposed with recess portion 236, and prominent towards direction, the i.e. x-axis direction rectangular relative to bottom 238 Out.Circumferential protrusions portion 303 of the protrusion 30 by the radial projection 302 that extends from radially inner side towards outside and circumferentially It is formed.In 8 protrusions 30, close to y-axis 4 protrusions 30 by 2 303 shapes of radial projection 302 and 1 circumferential protrusions portion As vertical view U shape.4 protrusions 30 far from y-axis are formed as by 1 radial projection 302 and 1 circumferential protrusions portion 303 Overlook く shape.
Fig. 8 is the cross-sectional view of protrusion 30, and protrusion 30 has front end 30a and ratio fusing department 30b.Front end 30a Be formed as sharp substantially coniform in front end.Ratio fusing department 30b is located at the positive direction of the x-axis side of front end 30a, and is formed For, before melting in the state of, the sectional area of the right angle orientation vertical with x-axis is certain in the prescribed limit of x-axis direction.
On the face of the negative direction of the x-axis side of deposition plate 29, on the y axis, it is provided with 2 engaging protrusions 31.By magnetic yoke branch When frame 23 and fixed 29 deposition of deposition plate, engaging protrusion 31 engages with the second through hole 234, limits deposition plate 29 relative to magnetic yoke The circumferential direction of bracket 23 is mobile.
X-axis direction distance between the bottom 238 and deposition plate 29 of yoke 23 is set to, when in yoke 23 When a part of the protrusion 30 or bottom 238 that have melted when fixed with 29 deposition of deposition plate grows into burr, the burr with Deposition plate 29 abuts.
In Fig. 4, the deposition part of bottom 238 Yu protrusion 30 is indicated with heavy line.
After a pair of magnetic yoke 21,22 is installed to yoke 23, deposition plate 29 is covered, to yoke 23 and deposition plate 29 Ultrasonic wave coating is carried out, to obtain yoke assembly.Ultrasonic wave coating is to make heat by subtle ultrasonic wave vibration and plus-pressure The processing technology that plastic resin moment melts and engages.A pair of magnetic yoke 21,22 and deposition plate 29 are relative to yoke 23 Assembling can be carried out all from a direction, therefore be advantageous in terms of assembling operation.
[ring concentrator component]
Fig. 9 is the exploded perspective view of ring concentrator component, and Figure 10 is the plan view of ring concentrator bracket 26, and Figure 11 is the master of Fig. 9 Want magnified partial view.
Ring concentrator component has a pair of of ring concentrator 24,25, ring concentrator bracket 26 and deposition plate (the first holding member) 29.By Deposition plate 29 and ring concentrator bracket 26 constitute holding member.
First ring concentrator (the first detection part) 24, which has, to be formed as surrounding rotary shaft O and is formed as along with rotary shaft O Centered on imaginary circle and a pair of of circular-arc part 241,241 opposite each other and the collection for connecting a pair of of circular-arc part 241,241 Magnetic portion 242.The imaginary circle of a pair of of circular-arc part 241,241 is set to the diameter of the second annular portion 222 than the second magnetic yoke 22 Greatly, and it is smaller than the diameter of the first annular portion 212 of the first magnetic yoke 21.Magnetic portion 242 is formed as right angle relative to rotary shaft O.
Second ring concentrator (the second detection part) 25, which has, to be formed as surrounding rotary shaft O and is formed as along with rotary shaft O Centered on imaginary circle and a pair of of circular-arc part 251,251 opposite each other and the collection for connecting a pair of of circular-arc part 251,251 Magnetic portion 252.The imaginary circle of a pair of of circular-arc part 251,251 be set to it is smaller than the imaginary diameter of a circle of the first ring concentrator 24, and And it is bigger than the diameter of the second annular portion 222 of the second magnetic yoke 22.Magnetic portion 252 is formed as convex, and phase towards radial outside Right angle is formed as rotary shaft O.
Ring concentrator bracket 26 with center with opening portion 261c annular portion 261, from the outer peripheral edge of annular portion 261 to The peripheral part 262 that negative direction of the x-axis side extends and 2 circles for being set to the radial outside of annular portion 261 and extending along the x-axis direction Column portion 263.
It is bigger than the outer diameter of yoke 23 that the opening portion 261c of annular portion 261 is set to diameter.In the x of annular portion 261 Axis negative direction side 261a is formed with the first engaging slot 264 and the storage the of the positive direction of the x-axis end of the first ring concentrator 24 of storage Second engaging slot 265 of the positive direction of the x-axis end of two ring concentrators 25.Between the first engaging slot 264 and the second engaging slot 265, It is provided with and forms partial cut corresponding with the magnetic portion 253 of the magnetic portion 243 of the first ring concentrator 24 and the second ring concentrator 25 Vertical view when for C-shape arc-shaped wall portion 266.The first collection magnetic is being mounted with to the first engaging slot 264 and the second engaging slot 265 When ring 24 and the second ring concentrator 25, the circular-arc part 241,241 of the first ring concentrator 24 and the outer peripheral surface of arc-shaped wall portion 266 are supported It connects, the circular-arc part 251,251 of the second ring concentrator 25 is abutted with the inner peripheral surface of arc-shaped wall portion 266.In addition, the second ring concentrator 25 Magnetic portion 252 abutted with the end face 266b of the cut out portion of arc-shaped wall portion 266.The magnetic portion of a pair of of ring concentrator 24,25 242,252 arc-shaped wall portion 266 cut out portion it is opposite.It is formed on the negative direction of the x-axis face 266a of arc-shaped wall portion 266 Engaging slot 267, the engaging slot 267 are set as right angle relative to rotary shaft O, when having carried out deposition to deposition plate 29 with deposition plate 29 engaging protrusion 31 engages.From the first engaging slot 264 and the second engaging slot 265 to the negative direction of the x-axis face of arc-shaped wall portion 266 The x-axis direction length of 266a is set shorter than the x-axis direction length of the first ring concentrator 24 and the second ring concentrator 25.
Recess portion 32 and wall portion 33 are provided on the negative direction of the x-axis face 266a of arc-shaped wall portion 266.Recess portion 32 is circumferentially etc. It has been positioned apart from 8.Circumferential direction of the recess portion 32 by the radial recess 32a that extends from radially inner side towards outside and circumferentially Recess portion 32b is formed.In 8 recess portions 32,2 recess portions 32 close with the end face 266b of the cut out portion of arc-shaped wall portion 266 are by 1 A radial recess 32a and 1 peripheral recess 32b are constituted.It is left 6 recess portions 32 by 2 radial recess 32a and 1 peripheral recess 32b is constituted.The radial width of peripheral recess 32b formed than arc-shaped wall portion 266 inner peripheral to outer peripheral edge width one Half is small.Recess portion 32 has the bottom 34 with 29 deposition of deposition plate, and is formed towards 29 side of deposition plate (negative direction of the x-axis side) and opens Mouthful.Bottom 34 is formed as orthogonal with x-axis direction planar.
Wall portion 33 is arranged in a manner of surrounding the complete cycle of opening edge along the opening edge of recess portion 32, wall portion 33 and deposition plate 29 it Between x-axis direction distance than the x-axis direction between bottom 34 and deposition plate 29 apart from short, also, wall portion 33 is formed as in Jiang Ji When magnet ring bracket 26 and deposition plate 29 have carried out deposition fixation, do not abutted with deposition plate 29.Wall portion 33 has rake 35, this inclines Inclined portion 35 is tilted in a manner of increasing the opening area of recess portion 32 towards opening edge side from bottom 34.
On the positive direction of the x-axis face of annular portion 261, it is provided with the circle of the circuit substrate 27b of bearing Hall IC sensor 27 Column portion 268.In cylindrical portion 268, it is formed with the threaded hole 268a for the fixed circuit substrate 27b of bolt.
In annular portion 261, the corresponding axial position of radial gap between a pair of of magnetic portion 242,252 is formed with The opening portion 261e penetrated through for Hall IC sensor 27.The sensor portion of Hall IC sensor 27 is configured in the centre of radial gap Position.
The negative direction of the x-axis side end of peripheral part 262 has can be to axis incorporating section 17a (the reference figure of gear box casing 17 2) outer diameter of side wall intercalation.
Cylindrical portion 263 is formed with the threaded hole 263a for 26 bolt of ring concentrator bracket to be fixed on to gear box casing 17.
Deposition plate 29 and the deposition plate of yoke assembly are identical.Between the bottom 34 and deposition plate 29 of ring concentrator bracket 26 X-axis direction distance be set to, when the protrusion 30 melted when ring concentrator bracket 26 and 29 deposition of deposition plate are fixed or When a part of person bottom 34 grows into burr, which abuts with deposition plate 29.
In Figure 10, the deposition part of bottom 34 Yu protrusion 30 is indicated with heavy line.
After a pair of of ring concentrator 24,25 is installed to ring concentrator bracket 26, deposition plate 29 is covered, and to ring concentrator bracket 26 Ultrasonic wave coating is carried out with deposition plate 29, to obtain ring concentrator component.Since a pair of of ring concentrator 24,25 and deposition plate 29 are opposite It can all be carried out from a direction in the assembling of ring concentrator bracket 26, so being advantageous in terms of assembling operation.In addition, Since 29 use of deposition plate deposition plate identical with yoke assembly can aid in so being able to suppress the increase of number of components Cost reduces.
Next, illustrating the movement of the torque sensor 13 of embodiment 1.
In the state of no torque input, the circumferencial direction center of claw 211,221 is located at the magnetic pole of multipole magnet 20 Boundary on, that sees from claw 211,221 is equal relative to the pole N of multipole magnet 20, the magnetic conductance of the pole S, therefore from multipole magnetic The magnetic flux that the pole N of iron 20 generates enters claw 211,221, and enters as former state to the pole S of multipole magnet 20.Therefore, in a pair Without flowing magnetic flux between ring concentrator 24,25, so Hall IC sensor 27 exports medium voltage.
If driver rotates steering wheel 1, torsion is generated in torsion bar 3, is produced between steering shaft 2 and pinion shaft 4 Raw Relative angular displacement.The Relative angular displacement as the Relative angular displacement between claw 211,221 and multipole magnet 20 and Occur.If generating Relative angular displacement between claw 211,221 and multipole magnet 20, the balance of magnetic conductance is destroyed, Magnetic flux is flowed in the magnetic circuit comprising Hall IC sensor 27, that is, following magnetic circuit: the magnetic flux stream generated by the pole N of multipole magnet 20 The claw of the biggish side of the area extremely opposed with N into claw 211,221, and via a pair of of ring concentrator 24,25 from S The claw of the biggish side of extremely opposed area is returned to the pole S of multipole magnet 20.At this point, being detected using Hall IC sensor 27 The magnetic flux flowed between a pair of of ring concentrator 24,25 is able to detect so as to measure Relative angular displacement and acts on torsion bar 3 Torque.
Then, illustrate the function and effect of embodiment 1.
[improving detection accuracy]
In rotary angle detecting device, in the case where making detection part be held in holding member using insert part forming, have May due to holding member cooling meat and internal stress is generated in detection part, cause detection accuracy to reduce.
Compared to this, in the yoke assembly of embodiment 1, pressed from both sides along the x-axis direction using deposition plate 29 and yoke 23 In the state of holding a pair of magnetic yoke 21,22, by deposition plate 29 and yoke 23, deposition is fixed each other.Therefore, a pair of magnetic yoke 21, In 22, internal stress caused by the cooling meat with insert part forming will not be generated.Thereby, it is possible to inhibit a pair of magnetic yoke 21, 22 deformation can be improved the detection accuracy of torque sensor 13.In addition, since a pair of of holding member (deposition plate can be utilized 29, yoke 23) 2 magnetic yokes 21,22 are kept, so not needing that deposition plate is arranged for each magnetic yoke, portion can be reduced Number of packages amount.Moreover, can be improved electric power steering device to the control essence for turning to power-assist power by improving Torque test precision Degree.
In the ring concentrator component of embodiment 1, a pair is being clamped along the x-axis direction using deposition plate 29 and ring concentrator bracket 26 In the state of ring concentrator 24,25, by deposition plate 29, deposition is fixed each other with ring concentrator bracket 26.Therefore, a pair of of ring concentrator 24, In 25, internal stress caused by the cooling meat with injection molded will not be generated.Thereby, it is possible to inhibit a pair of of ring concentrator 24,25 deformation can be improved the detection accuracy of torque sensor 13.In addition, since a pair of of holding member (deposition can be utilized Plate 29, ring concentrator bracket 26) 2 ring concentrators 24,25 are kept, so not needing that deposition plate, energy is arranged for each ring concentrator Enough reduce number of components.Moreover, can be improved electric power steering device to steering power-assist power by improving Torque test precision Control precision.
[burr is inhibited to fall off]
In the fixed yoke 23 of deposition and deposition plate 29, protrusion 30 and bottom 238 melt and generate burr.If The burr falls off, then in the presence of the possibility for generating a problem that foreign matter is mixed into.Therefore, in the yoke assembly of embodiment 1, setting There are recess portion 236 and wall portion 237,30 deposition of protrusion of recess portion 236 and deposition plate 29, wall portion 237 surrounds the opening edge of recess portion 236 Complete cycle, and it is shorter at a distance from deposition plate 29 than bottom 238 at a distance from deposition plate 29.As a result, in the fixed magnetic yoke of deposition The burr that bracket 23 and when deposition plate 29 generate can be incorporated in the recess portion 236 surrounded by wall portion 237, be able to suppress burr from Yoke assembly falls off.
In addition, being provided with recess portion 32 and wall portion 33, recess portion 32 and deposition plate 29 in the ring concentrator component of embodiment 1 30 deposition of protrusion, wall portion 33 surround recess portion 32 opening edge complete cycle, and its at a distance from deposition plate 29 than bottom 34 with The distance of deposition plate 29 is short.The burr generated as a result, in the fixed ring concentrator bracket 26 of deposition and deposition plate 29 can be incorporated in In the recess portion 32 surrounded by wall portion 33, it is able to suppress burr and falls off from ring concentrator component.
[inhibiting burr at random]
Figure 12 A and Figure 12 B are the hairs for indicating to generate when having carried out ultrasonic wave coating to ring concentrator bracket 26 and deposition plate 29 The figure of the state of thorn.If making to collect using vibrational energy since the state for making protrusion 30 be butted on bottom 34 as Figure 12 A Magnet ring bracket 26 and 29 frictional vibration of deposition plate and generate frictional heat, and by deposition plate 29 to 26 side of ring concentrator bracket press, Then a part of protrusion 30 or bottom 34 grows into burr.Here, in the ring concentrator component of embodiment 1, by deposition plate The distance between 29 and bottom 34 are set as, and abut the burr grown up to deposition plate 29.As a result, as shown in Figure 12 B, due to length At burr be in the state between bottom 34 and deposition plate 29 of being clipped in, so burr can be inhibited at random in recess portion 32.
In addition, the radial width of the peripheral recess 32b of recess portion 32 is made to be formed as the inner peripheral than arc-shaped wall portion 266 outside The half of the width of periphery is small.That is, by not making the radial width of recess portion 32 become greater to necessary sized or more, it can be in recess portion 32 Interior inhibition burr is at random.
In the yoke assembly of embodiment 1, the distance between deposition plate 29 and bottom 238 are set as, when solid in deposition Determine yoke 23 and when a part of protrusion 30 or bottom 238 that when deposition plate 29 has melted grows into burr, the hair Thorn is abutted with deposition plate 29.Burr is clipped between bottom 238 and deposition plate 29 as a result, so can inhibit hair in recess portion 236 Pierce (movement) at random.
In addition, the inner peripheral for being formed as the radial width of the internal diameter side section 236a of recess portion 236 than mounting surface 231c arrives The half of the width of outer peripheral edge is small.That is, by not making the radial width of recess portion 236 become greater to necessary sized or more, it can be recessed Inhibit burr at random in portion 236.
[improving cladding intensity]
In the yoke assembly of embodiment 1, recess portion 236 and protrusion 30 are by the part that extends from radially inner side towards outside (radial extension 236b, radial projection 302) and part (internal diameter side section 236a, circumferential protrusions portion circumferentially 303) it constitutes.That is, by the way that radial deposition part and circumferential deposition part is arranged, it is molten with the side setting only radially or in circumferential direction The case where applying part is compared, due to that can extend melting length in right angle orientation, so it is possible to realize improve cladding intensity.
In the ring concentrator component of embodiment 1, recess portion 32 and protrusion 30 are by the portion that extends from radially inner side towards outside Point (radial recess 32a, radial projection 302) and part (peripheral recess 32b, circumferential protrusions portion 303) structure circumferentially At.That is, deposition part is arranged with the side only radially or in circumferential direction by the way that radial deposition part and circumferential deposition part is arranged The case where compare, due to can extend in right angle orientation melting length, so it is possible to realize improve cladding intensity.
[while ensuring intensity and ensuring volume]
In the yoke assembly of embodiment 1, wall portion 237 is provided with rake 239, the rake 239 is with from bottom 238 The mode for increasing opening area towards opening edge side tilts.Assuming that from bottom to opening edge be certain opening area the case where Under, it cannot ensure the intensity of wall portion if increasing opening area.On the other hand, it cannot ensure to use if reducing opening area The volume of the recess portion needed for storing burr.Therefore, increase inclining for opening area by being arranged from bottom 238 towards opening edge side Inclined portion 239, it is possible to realize ensure 237 intensity of wall portion simultaneously and ensure 236 volume of recess portion.
In the ring concentrator component of embodiment 1, wall portion 33 has rake 35, and the rake 35 is from bottom 34 towards opening The mode that peristoma side increases opening area tilts.Thereby, it is possible to seek the intensity for ensuring wall portion 33 simultaneously and ensure recess portion 32 Volume.
[inhibiting burr yield and streamlining management]
In embodiment 1, there is the protrusion 30 of deposition plate 29 ratio fusing department 30b, ratio fusing department 30b to be formed For, before melting in the state of, the sectional area of the right angle orientation vertical with x-axis is certain in the prescribed limit of x-axis direction. Assuming that protrusion is integrally the shape that diameter is gradually expanded from front end towards root side in circular cone, pyramidal shape etc., Melting volume is increased in a manner of conic section relative to the melting length of x-axis direction.That is, the yield of burr relative to Melting length is increased in a manner of conic section, so being difficult to carry out the yield management of burr.Compared to this, in embodiment 1 In ratio fusing department 30b, melting volume increases relative to the melting length of x-axis direction in ratio, so being able to suppress burr Yield, and become easy the management of the yield of burr.Since the yield of burr is fewer, for storing burr institute The volume of the recess portion 236 (perhaps recess portion 32) needed is smaller so the intensity of wall portion 237 (or wall portion 33) ensures to become easy.
[homogenizing cladding intensity and inhibition deposition are bad]
In the case where protrusion generally circular cone or pyramidal shape, corresponding to connecing for the x-axis direction of protrusion and bottom Coincidence is set, the sectional area variation of the protrusion of the bonding station.Therefore, if the engagement position of the x-axis direction of protrusion and bottom Set it is different for each protrusion, then cladding intensity generate deviation.Compared to this, the protrusion 30 of embodiment 1 has ratio Fusing department 30b, ratio fusing department 30b are formed as, before melting in the state of, the sectional area of the right angle orientation vertical with x-axis In the prescribed limit of x-axis direction be it is certain, therefore, even if the x-axis direction of protrusion and bottom 238 (or bottom 34) Bonding station variation, the sectional area of the bonding station is also certain.Therefore, even if in protrusion and bottom 238 (or bottom 34) in the case that the bonding station of x-axis direction is different for each protrusion, cladding intensity can be also homogenized.
In addition, in the case where protrusion generally circular cone or pyramidal shape, the front end of protrusion and bottom it Between friction part caused by melting heat be easy to go to deposition plate side, compared to this, due to the x-axis side of ratio fusing department 30b The sectional area of upward prescribed limit is certain, so it is mobile to 29 side of deposition plate to be able to suppress melting heat.Deposition is bad to be The reason of deposition plate 29 floats relative to yoke 23 (or ring concentrator bracket 26), but in embodiment 1, by protrusion 30 Set scale fusing department 30b of portion, is able to suppress floating for deposition plate 29.
Then, structure effect corresponding with its of the yoke assembly of embodiment 1 is enumerated.
(1) rotary angle detecting device includes pinion shaft 4 and steering shaft 2, is configured to centered on rotary shaft O It rotates relative to one another；Multipole magnet 20 is set to pinion shaft 4 and is alternately arranged the pole N and the pole S around rotary shaft O；A pair of of magnetic Yoke 21,22 is opposed to be arranged and formed by magnetic material with multipole magnet 20；Holding member is fixed on steering shaft 2, It is made of the yoke 23 and deposition plate 29 formed using thermoplastic resin material, by utilizing yoke 23 and deposition Plate 29 clamps in the state of a pair of magnetic yoke 21,22 that deposition is fixed each other by yoke 23 and deposition plate 29, with a pair of magnetic yoke 21, 22 keep a pair of magnetic yoke 21,22 with the discontiguous mode of steering shaft 2；Recess portion 236, be set to yoke 23 with deposition plate 29 opposed sides form in a manner of towards 29 side opening of deposition plate and have bottom 238；Wall portion 237, along recess portion 236 opening edge setting, be formed as the distance between itself and deposition plate 29 it is shorter than the distance between bottom 238 and deposition plate 29 and It is not abutted with deposition plate 29；Protrusion 30, by it is opposed with recess portion 236 and towards 236 side of recess portion it is outstanding in a manner of be set to Deposition plate 29 makes yoke 23 and deposition plate 29 molten and melting in the state that its front end 30a is abutted with bottom 238 It applies；Hall IC sensor 27, detection according to the multipole magnet 20 associated with the relative rotation of pinion shaft 4 and steering shaft 2 with The relative rotation of a pair of magnetic yoke 21,22 and the variation in the magnetic field in a pair of magnetic yoke 21,22 for changing, to detect pinion shaft 4 With the relative rotation angle of steering shaft 2.
Therefore, inside caused by the cooling meat along with insert part forming will not be generated in a pair of magnetic yoke 21,22 to answer Power can be improved the detection accuracy of torque sensor 13 so being able to suppress the deformation of a pair of magnetic yoke 21,22.
It is wrapped in addition, can be incorporated in the fixed yoke 23 of deposition with the burr generated when deposition plate 29 by wall portion 237 In the recess portion 236 enclosed, it is able to suppress burr and falls off from yoke assembly.
(2) for deposition plate 29, the distance between bottom 238 and deposition plate 29 are arranged to, in the fixed magnetic of deposition A part of the protrusion 30 or bottom 238 that have melted when yoke bracket 23 and deposition plate 29 grows into burr, burr and deposition plate 29 abut.
Therefore, burr is clipped between bottom 238 and deposition plate 29, so can inhibit burr is at random (to move in recess portion 236 It is dynamic).
(3) yoke 23 and deposition plate 29 are formed as circular or arc-shaped in a manner of surrounding rotary shaft O, will revolve The radiation direction of shaft O is set as radial and when by being set as circumferential around the direction of rotary shaft, recess portion 236 and protrusion 30 have from Part (radial extension 236b, radial projection 302) that radially inner side extends towards outside and part circumferentially are (interior Diameter side section 236a, circumferential protrusions portion 303).
Therefore, compared with the case where deposition part is arranged in an only side radially or in circumferential direction, due to can be in right angle side Extend melting length upwards, so it is possible to realize improve cladding intensity.
(4) part circumferentially of recess portion 236 is formed as, mounting surface of the width in the radial direction than yoke 23 The inner peripheral of 231c to outer peripheral edge width half it is small.
Therefore, by not making the radial width of recess portion 236 become greater to necessary sized or more, can inhibit in recess portion 236 Burr is at random.
(5) wall portion 237 has the inclined rake in a manner of increasing opening area towards opening edge side from bottom 238 239。
Therefore, it is possible to realize ensure the intensity of wall portion 237 simultaneously and ensure the volume of recess portion 236.
(6) bottom 238 is formed as planar, and the direction rectangular relative to the plane of bottom 238 is being set as reference axis When line, there is protrusion 30 ratio fusing department 30b, ratio fusing department 30b to be formed as prominent along the direction of datum axis, and Be formed as, before melting in the state of, relative to datum axis right angle orientation sectional area the direction of datum axis regulation It is substantially certain in range.
Therefore, it is able to suppress the yield of burr, and the management of the yield of burr becomes easy.In addition, can be equal Change cladding intensity, and it is bad to be able to suppress deposition.
(7) power steering gear includes steering mechanism 9, has the rotation of adjoint steering wheel 1 and the steering shaft 2 that rotates With the pinion shaft 4 connecting via torsion bar 3 with steering shaft 2, the steering operation of steering wheel 1 is transferred to deflecting roller 8,8；Gear-box Shell 17 rotatably freely keeps steering shaft 2 and pinion shaft 4；Multipole magnet 20, is set to pinion shaft 4, and around Rotary shaft O is alternately arranged the pole N and the pole S；A pair of magnetic yoke 21,22, is opposed to be arranged, and by magnetic material with multipole magnet 20 It is formed；Holding member is fixed on steering shaft 2, by the yoke 23 and deposition plate 29 formed using thermoplastic resin material Constitute, by the state of clamping a pair of magnetic yoke 21,22 using yoke 23 and deposition plate 29 by yoke 23 and molten Applying plate 29, deposition is fixed each other, keeps a pair of magnetic yoke 21,22 in such a way that a pair of magnetic yoke 21,22 and steering shaft 2 are discontiguous；Recess portion 236, it is set to the side opposed with deposition plate 29 of yoke 23, is formed simultaneously in a manner of towards 29 side opening of deposition plate And there is bottom 238；Wall portion 237, along recess portion 236 opening edge be arranged, and be formed as its between deposition plate 29 away from It is short with the distance between deposition plate 29 from than bottom 238 and do not abutted with deposition plate 29；Protrusion 30, with right with recess portion 236 It sets and is set to deposition plate 29 towards 236 side of recess portion mode outstanding, pass through what is abutted in its front end 30a with bottom 238 It melts under state and makes yoke 23 and 29 deposition of deposition plate；Hall IC sensor 27, detection according to pinion shaft 4 with The relative rotation of the associated multipole magnet 20 of the relative rotation of steering shaft 2 and a pair of magnetic yoke 21,22 and change a pair of magnetic yoke 21, The variation in the magnetic field in 22, to detect the relative rotation angle of pinion shaft 4 Yu steering shaft 2；Electric motor 10, to turning machine Structure 9, which applies, turns to power-assist power；Motor control circuit 15 is being turned to based on what is found out from the output signal of Hall IC sensor 27 The torque generated between axis 2 and pinion shaft 4 calculates the command signal exported to electric motor 10, and to electric motor 10 output instruction signals.
Therefore, inside caused by the cooling meat along with insert part forming will not be generated in a pair of magnetic yoke 21,22 to answer Power can be improved the detection accuracy of torque sensor 13 so being able to suppress the deformation of a pair of magnetic yoke 21,22.
It is wrapped in addition, can be incorporated in the fixed yoke 23 of deposition with the burr generated when deposition plate 29 by wall portion 237 In the recess portion 236 enclosed, it is able to suppress burr and falls off from yoke assembly.
(8) a pair of when the radiation direction of rotary shaft O being set as radial and by being set as circumferential around the direction of rotary shaft O Magnetic yoke 21,22 is made of the first magnetic yoke 21 and the second magnetic yoke 22, and the first magnetic yoke 21 is by the first annular portion 212 and the first claw 211 It constitutes, the first annular portion 212 is formed as circular in a manner of surrounding rotary shaft O, and the first claw 211 is in the first annular portion Multiple multiple plate-shaped members are set in a manner of to be separated from each other arranging in 212 circumferential direction, the first claw 211 be respectively provided with from First annular portion 212 is to the first bending section 211a of radial interior direction extension and from the first bending section 211a along rotary shaft The first test section 211b that direction is extended in the mode opposed with multipole magnet 20, the second magnetic yoke 22 is by 222 He of the second annular portion Second claw 221 is constituted, the second annular portion 222 the first annular portion 212 radial inside and separated with the first annular portion 212 Ground setting, and be formed as circular, the second claw 221 to be separated from each other is arranged in the circumferential direction of the second annular portion 222 Mode multiple multiple plate-shaped members are set, the second claw 221 is respectively provided with from the second annular portion 222 to radial outside To the second bending section 221a of extension and from the second bending section 221a along the direction of rotary shaft with the side opposed with multipole magnet 20 The second test section 221b, the second test section 221b that formula extends is respectively with the alternately arranged side between each first test section 211b Formula configuration, and the first test section 211b and the second test section 221b configures the magnetic yoke on the same circle centered on rotary shaft O Bracket 23 includes main part 231, and with mounting surface 231c, mounting surface 231c is relative to rotary shaft O in the flat of approximate right angle Face；First through hole 232 is formed as penetrating through mounting surface 231c for the first test section 211b；First incorporating section 233, is set It is set to continuous with the first through hole 232 and extends towards radial outside, formed in a manner of towards mounting surface 231c side opening For concavity and store the first bending section 211a；Second through hole 234 is formed as penetrating through mounting surface for the second test section 221b 231c；Second incorporating section 235 is arranged to continuous with the second through hole 234 and extended towards radial inside, taken with direction The mode of section 231c side opening is formed as concavity and stores the second bending section 221a；Recess portion 236 is by internal diameter side section 236a It is constituted with radial extension 236b, internal diameter side section 236a is formed in radially inner side, radial extension compared to the first through hole 232 236b towards radially outer direction from internal diameter side section 236a between the first through hole 232 and the second through hole 234 to pass through Mode be arranged.
Therefore, by in the first through hole 232 and the first incorporating section 233 that are mutually juxtaposed and the second through hole 234 and Recess portion 236 is arranged in the mode passed through in gap between second incorporating section 235, and it is possible to realize the miniaturizations of device.
Then, structure effect corresponding with its of the ring concentrator component of embodiment 1 is enumerated.
(9) rotary angle detecting device includes pinion shaft 4 and steering shaft 2, is configured to centered on rotary shaft O It rotates relative to one another；Multipole magnet 20 is set to pinion shaft 4 and is alternately arranged the pole N and the pole S around rotary shaft O；A pair of collection Magnet ring 24,25 is opposed to be arranged and formed by magnetic material with multipole magnet 20；Holding member is fixed on steering shaft 2, it is made of the ring concentrator bracket 26 and deposition plate 29 formed using thermoplastic resin material, by utilizing ring concentrator bracket 26 Clamp in the state of a pair of of ring concentrator 24,25 that deposition is fixed each other by ring concentrator bracket 26 and deposition plate 29 with deposition plate 29, with A pair of of ring concentrator 24,25 keeps a pair of of ring concentrator 24,25 with the discontiguous mode of steering shaft 2；Recess portion 32, is set to ring concentrator The side opposed with deposition plate 29 of bracket 26 forms in a manner of towards 29 side opening of deposition plate and has bottom 34；Wall Portion 33, the opening edge along recess portion 32 are arranged, be formed as the distance between itself and deposition plate 29 than bottom 34 and deposition plate 29 it Between distance it is short and do not abutted with deposition plate 29；Protrusion 30, with opposed with recess portion 32 and towards 32 side of recess portion side outstanding Formula is set to deposition plate 29, made and being melted in the state that its front end 30a is abutted with bottom 34 ring concentrator bracket 26 with 29 deposition of deposition plate；Hall IC sensor 27, to according to the multipole associated with the relative rotation of pinion shaft 4 and steering shaft 2 The variation in the relative rotation of magnet 20 and a pair of of ring concentrator 24,25 and the magnetic field in a pair of of ring concentrator 24,25 for changing is examined It surveys, to detect the relative rotation angle of pinion shaft 4 Yu steering shaft 2.
Therefore, inside caused by the cooling meat along with insert part forming will not be generated in a pair of of ring concentrator 24,25 Stress can be improved the detection accuracy of torque sensor 13 so being able to suppress the deformation of a pair of of ring concentrator 24,25.
It is wrapped in addition, can be incorporated in the fixed ring concentrator bracket 26 of deposition with the burr generated when deposition plate 29 by wall portion 33 In the recess portion 32 enclosed, it is able to suppress burr and falls off from ring concentrator component.
(10) for deposition plate 29, the distance between bottom 34 and deposition plate 29 are arranged to, in deposition fixed set A part of protrusion 30 or bottom 34 that magnet ring bracket 26 and when deposition plate 29 have melted grows into burr, and burr and molten Plate 29 is applied to abut.
Therefore, burr is clipped between bottom 34 and deposition plate 29, so can inhibit burr is at random (to move in recess portion 32 It is dynamic).
(11) ring concentrator bracket 26 and deposition plate 29 are formed as circular or arc-shaped in a manner of surrounding rotary shaft O, The radiation direction of rotary shaft O is set as radial and when by being set as circumferential around the direction of rotary shaft, recess portion 32 and protrusion 30 have There are the part (radial recess 32a, radial projection 302) extended from radially inner side towards outside and part circumferentially (peripheral recess 32b, circumferential protrusions portion 303).
Therefore, compared with the case where deposition part is arranged in an only side radially or in circumferential direction, due to can be in right angle side Extend melting length upwards, so it is possible to realize improve cladding intensity.
(12) part circumferentially of recess portion 32 is formed as, arc-shaped wall portion of the radial width than ring concentrator bracket 26 266 inner peripheral to outer peripheral edge width half it is small.
Therefore, by not making the radial width of recess portion 32 become greater to necessary sized or more, hair can be inhibited in recess portion 32 It pierces at random.
(13) wall portion 33 has the inclined rake 35 in a manner of increasing opening area towards opening edge side from bottom 34.
Therefore, it is possible to realize ensure the intensity of wall portion 33 simultaneously and ensure the volume of recess portion 32.
(14) bottom 34 is formed as planar, and the direction rectangular relative to the plane of bottom 34 is being set as datum axis When, protrusion 30 is formed as prominent along datum axis direction, and there is ratio fusing department 30b, ratio fusing department 30b to be formed For, before melting in the state of, right angle orientation sectional area relative to datum axis is big in the prescribed limit of datum axis direction It causes certain.
Therefore, it is able to suppress the yield of burr, and the management of the yield of burr becomes easy.In addition, can be equal Change cladding intensity, and it is bad to be able to suppress deposition.
(15) power steering gear includes steering mechanism 9, the steering shaft 2 rotated with the rotation with steering wheel 1 With the pinion shaft 4 connecting via torsion bar 3 with steering shaft 2, the steering operation of steering wheel 1 is transferred to deflecting roller 8,8；Gear-box Shell 17 rotatably freely keeps steering shaft 2 and pinion shaft 4；Multipole magnet 20, is set to pinion shaft 4, and around Rotary shaft O is alternately arranged the pole N and the pole S；A pair of of ring concentrator 24,25, is opposed to be arranged, and by magnetic material with multipole magnet 20 Material is formed；Holding member is fixed on steering shaft 2, the ring concentrator bracket 26 by being formed using thermoplastic resin material and deposition Plate 29 constitute, by the state of clamping a pair of of ring concentrator 24,25 using ring concentrator bracket 26 and deposition plate 29 by ring concentrator Bracket 26 with deposition plate 29 fix each other by deposition, keeps a pair of of collection in such a way that a pair of of ring concentrator 24,25 and steering shaft 2 are discontiguous Magnet ring 24,25；Recess portion 32 is set to the side opposed with deposition plate 29 of ring concentrator bracket 26, with towards 29 side of deposition plate The mode of opening forms and has bottom 34；Wall portion 33, the opening edge along recess portion 32 is arranged, and is formed as itself and deposition The distance between plate 29 is shorter with the distance between deposition plate 29 than bottom 34 and does not abut with deposition plate 29；Protrusion 30, with It is opposed with recess portion 32 and be set to deposition plate 29 towards 32 side of recess portion mode outstanding, by its front end 30a and bottom It melts in the state of 34 abuttings and makes ring concentrator bracket 26 and 29 deposition of deposition plate；Hall IC sensor 27, to according to it is small The relative rotation of the associated multipole magnet 20 of the relative rotation of gear shaft 4 and steering shaft 2 and a pair of of ring concentrator 24,25 and change The variation in the magnetic field in a pair of of ring concentrator 24,25 is detected, to detect the relative rotation angle of pinion shaft 4 Yu steering shaft 2； Electric motor 10 applies steering mechanism 9 and turns to power-assist power；Motor control circuit 15 is based on from Hall IC sensor 27 The torque generated between steering shaft 2 and pinion shaft 4 that finds out of output signal, calculate the finger exported to electric motor 10 Enable signal, and to 10 output instruction signal of electric motor.
Therefore, inside caused by the cooling meat along with insert part forming will not be generated in a pair of of ring concentrator 24,25 Stress can be improved the detection accuracy of torque sensor 13 so being able to suppress the deformation of a pair of of ring concentrator 24,25.
It is wrapped in addition, can be incorporated in the fixed ring concentrator bracket 26 of deposition with the burr generated when deposition plate 29 by wall portion 33 In the recess portion 32 enclosed, it is able to suppress burr and falls off from ring concentrator component.
(16) detection part is made of the first ring concentrator 24 and the second ring concentrator 25, and the first ring concentrator 24 is arranged radially Be formed as arc-shaped between the first annular portion 212 and the second annular portion 222, and around rotary shaft O, the second ring concentrator 25 is in diameter It sets up between the first ring concentrator 24 and the second annular portion 222, and be formed as arc-shaped, ring concentrator branch around rotary shaft O Frame 26 and deposition plate 29 are the components for clamping the first ring concentrator 24 and the second ring concentrator 25, and Hall IC sensor 27 is radially It is arranged between the first ring concentrator 24 and the second ring concentrator 25 and detects between the first ring concentrator 24 and the second ring concentrator 25 The Hall element of the variation in magnetic field.
Therefore, can will structure use identical with yoke assembly in ring concentrator component.
(other embodiments)
Although mode for carrying out the present invention is illustrated based on embodiment above, specific structure of the invention It is not limited to structure shown in embodiment, is also contained in the present invention without departing from the design alteration etc. in the range of inventive concept.
For example, illustrating the example applied to torque sensor in embodiment, but it can also apply to rotation sensor. In this case, second component is set to shell.
In addition, for the number of poles of magnetic part, if the pole N and S extremely respectively have it is 1 extremely above.
Wall portion necessarily surrounds the complete cycle of recess portion, as long as being set in the prescribed limit of opening edge of recess portion, has suppression The effect that burr processed falls off.Furthermore it is possible in at least part of range being able to solve in above-mentioned technical problem or Person remembers in any combination or omission claims and specification in at least part of range in it can have effect Each structural element carried.
The present invention is based on July 9th, 2014 Japan propose patent application application No. is the special of 2014-141097 Sharp CLAIM OF PRIORITY.The Japanese patent application No. filed an application on July 9 in 2014 is the patent of 2014-141097 including saying Bright book, claims, attached drawing and abstract including complete disclosure by by referring to mode charge to this hair as a whole In bright.
Description of symbols
1 steering wheel, 2 steering shafts (second component, input shaft), 3 torsion bars, 4 pinion shafts (first component, output shaft), 8 turns To wheel, 9 steering mechanism, 10 electric motors, 15 motor control circuits, 17 gear box casings (shell), 20 multipole magnet (magnetic portions Part), 21 first magnetic yokes (detection part), 22 second magnetic yokes (detection part), 23 yokes (holding member), 24 first collection magnetic Ring (detection part), 25 second ring concentrators (detection part), 26 ring concentrator brackets (holding member), 27 Hall IC sensor (magnetic Sensor), 29 deposition plates (holding member), 30 protrusions, 32 recess portions, 33 wall portions, 34 bottoms, 236 recess portions, 237 wall portions, 238 Bottom.

Claims (17)

1. a kind of rotary angle detecting device comprising:
The first component and second component are configured to rotate relative to one another centered on rotary shaft；
Magnetic part is set to the first component, and is configured as making the pole N and S extremely adjacent around the rotary shaft；
Detection part is opposed to be arranged, and is formed by magnetic material with the magnetic part；
Holding member is fixed on the second component, the first holding member by being formed using thermoplastic resin material and the Two holding members are constituted, by clamping the detection part using first holding member and second holding member By first holding member, deposition is fixed each other with second holding member under state, with the detection part and described the The discontiguous mode of two components keeps the detection part；
Recess portion is set to the side opposed with second holding member of first holding member, with towards described The mode of two holding member side openings forms and has bottom；
Wall portion, the opening edge along the recess portion are arranged, and are formed as described in the distance between itself and second holding member ratio Bottom is short with the distance between second holding member and does not abut with second holding member；
Protrusion, by it is opposed with the recess portion and towards the recess portion side it is outstanding in a manner of be set to second maintaining part Part is melted in the state of abutting in its front end with the bottom and keeps first holding member and described second Component deposition；
Magnetic Sensor, detection is according to the magnetic portion associated with the relative rotation of the first component and the second component The variation in the relative rotation of part and the detection part and the magnetic field in the detection part that changes, to detect described first The relative rotation angle of component and the second component.
2. rotary angle detecting device as described in claim 1, which is characterized in that
For second holding member, the distance between the bottom and second holding member are arranged to, The one of the protrusion or the bottom melted when fixed first holding member of deposition and second holding member Burr is grown into part, and the burr is abutted with second holding member.
3. rotary angle detecting device as described in claim 1, which is characterized in that
First holding member and second holding member are formed as circular or circle in a manner of surrounding the rotary shaft Arcuation,
It is described recessed when the radiation direction of the rotary shaft being set as radial and by being set as circumferential around the direction of the rotary shaft Portion and the protrusion have the part extended from the radial inside towards outside and along the parts of the circumferentially extending.
4. rotary angle detecting device as claimed in claim 3, which is characterized in that
The part along the circumferentially extending of the recess portion is formed as, in the width radially than first holding member It is small in the half of the width radially.
5. rotary angle detecting device as described in claim 1, which is characterized in that
The wall portion has the inclined rake in a manner of increasing opening area towards the opening edge side from the bottom.
6. rotary angle detecting device as described in claim 1, which is characterized in that
The bottom is formed as planar,
When the direction rectangular relative to the plane of the bottom is set as datum axis, the protrusion is melted with ratio Portion, which is formed as prominent along the direction of the datum axis, and is formed as, before melting in the state of, phase It is substantially certain in the prescribed limit in the direction of the datum axis for the right angle orientation sectional area of the datum axis.
7. rotary angle detecting device as described in claim 1, which is characterized in that
The detection part has the first magnetic yoke component and the second magnetic yoke component,
The first magnetic yoke component has the first claw and the first annular portion, and first claw is in same with the rotary shaft The multiple plate-shaped members configured on the circle of the heart and in the mode opposed with the magnetic part, first annular portion are formed as round Tubular and first claw is connected to each other,
The second magnetic yoke component has the second claw and the second annular portion, and second claw is in same with the rotary shaft The multiple plate-shaped members configured on the circle of the heart and in the mode opposed with the magnetic part, second annular portion are formed as round Tubular and second claw is connected to each other, second claw be respectively configured as first claw each claw it Between be alternately arranged, and second annular portion is configured as the inner circumferential side in first annular portion and radially divides each other From,
The Magnetic Sensor has Hall element, and the Hall element detection is along with because of the first component and described second The variation of the relative rotation of part and the relative angle of the magnetic part that generates and first claw and second claw And changing magnetic field,
First holding member has the insertion hole being inserted into for first claw and second claw,
Second holding member in first claw and second claw to be inserted into described in first holding member Insertion clamps the first magnetic yoke component and the second magnetic yoke component in the state of hole together with first holding member State is fixed with the first holding member deposition.
8. a kind of power steering gear comprising:
Steering mechanism has the rotation with steering wheel and the input shaft that rotates and via torsion bar and the input axis connection The steering operation of steering wheel is transferred to deflecting roller by output shaft；
Shell rotatably freely keeps the input shaft and the output shaft；
Magnetic part is set to the output shaft, and is configured as making the pole N and S extremely adjacent around the rotary shaft；
Detection part is opposed to be arranged, and is formed by magnetic material with the magnetic part；
Holding member is fixed on the input shaft, by the first holding member and second formed using thermoplastic resin material Holding member is constituted, by the shape for clamping the detection part using first holding member and second holding member By first holding member, deposition is fixed each other with second holding member under state, with the detection part and the input The discontiguous mode of axis keeps the detection part；
The side opposed with second holding member of first holding member is arranged in recess portion, with towards described The mode of two holding member side openings forms and has bottom；
Wall portion, the opening edge along the recess portion are arranged, and are formed as described in the distance between itself and second holding member ratio Bottom is short with the distance between second holding member and does not abut with second holding member；
Protrusion, by it is opposed with the recess portion and towards the recess portion side it is outstanding in a manner of be set to second maintaining part Part is melted in the state of abutting in its front end with the bottom and keeps first holding member and described second Component deposition；
Magnetic Sensor, detection according to the magnetic part associated with the relative rotation of the input shaft and the output shaft with The variation in the relative rotation of the detection part and the magnetic field in the detection part that changes, thus detect the input shaft with The relative rotation angle of the output shaft；
Electric motor applies the steering mechanism and turns to power-assist power；
Motor control circuit, based on being found out from the output signal of the Magnetic Sensor in the input shaft and the output shaft Between the torque that generates, calculate the command signal exported to the electric motor, and to described in electric motor output Command signal.
9. power steering gear as claimed in claim 8, which is characterized in that
When the radiation direction of the rotary shaft being set as radial and by being set as circumferential around the direction of the rotary shaft, the inspection It surveys component to be made of the first magnetic yoke component and the second magnetic yoke component, the first magnetic yoke component is by the first annular portion and the first claw It constitutes, first annular portion is formed as circular in a manner of surrounding the rotary shaft, and first claw is described the Multiple multiple plate-shaped members, first claw are set in a manner of to be separated from each other arranging in the circumferential direction of one annular portion It is respectively provided with the first bending section extended from first annular portion to the radial interior direction and is bent from described first The first test section that portion is extended along the direction of the rotary shaft in the mode opposed with the magnetic part, second magnetic yoke portion Part is made of the second annular portion and the second claw, second annular portion first annular portion the radial inside with It states the first annular portion to be disposed separately, and is formed as circular, second claw is described in second annular portion Multiple multiple plate-shaped members are set in a manner of to be separated from each other arranging in circumferential direction, and second claw is respectively provided with from described Second annular portion is to the second bending section of the radial lateral direction extension and from second bending section along the rotary shaft The second test section for being extended in the mode opposed with the magnetic part of direction, second test section is respectively each described Alternately arranged mode configures between first test section, and first test section and second test section configuration are with institute It states on the same circle centered on rotary shaft,
First holding member includes main part, and with mounting surface, which is relative to the rotary shaft in substantially The plane at right angle；First through hole is formed as penetrating through the mounting surface for first test section；First incorporating section, quilt It is set as continuous with first through hole and extends towards the radial outside, with towards the side of the mounting surface side opening Formula is formed as concavity and stores first bending section；Second through hole is formed as penetrating through institute for second test section State mounting surface；Second incorporating section is arranged to continuous with second through hole and extends towards the radial inside, with Be formed as concavity towards the mode of the mounting surface side opening and store second bending section；
The recess portion is made of internal diameter side section and radial extension, and the internal diameter side section is formed compared to first through hole In the radial inside, the radial extension is to be partially toward the radial lateral direction described from the internal side diameter It is arranged by way of between first through hole and second through hole.
10. power steering gear as claimed in claim 9 comprising:
First ring concentrator, is formed by magnetic material, and is opposed to be arranged with first annular portion；
Second ring concentrator, is formed by magnetic material, and is opposed to set with second annular portion and first ring concentrator It sets；
Third holding member, is formed by thermoplastic resin；
4th holding member, is formed by thermoplastic resin, by clamping described first together with the third holding member Deposition is fixed each other with the third holding member in the state of ring concentrator and second ring concentrator, the fixed first collection magnetic Ring and second ring concentrator；
The side opposed with the 4th holding member of the third holding member is arranged in second recess portion, with towards institute The mode for stating the 4th holding member side opening forms and has the second bottom；
Second wall portion, along second recess portion opening edge be arranged, be formed as its between the 4th holding member away from It is short with the distance between the 4th holding member from than second bottom and do not abutted with the 4th holding member；
Second connecting portion, by it is opposed with second recess portion and towards second recess portion side it is outstanding in a manner of be set to it is described 4th holding member makes the third holding member and melting in the state of abutting in its front end with second bottom With the 4th holding member deposition；
The magnetic sensor configuration is between first ring concentrator and second ring concentrator, by detecting the first collection magnetic The variation in the magnetic field between ring and second ring concentrator, detects the relative rotation angle of the input shaft Yu the output shaft.
11. power steering gear as claimed in claim 9, which is characterized in that
For second holding member, the distance between the bottom and second holding member are arranged to, The one of the protrusion or the bottom melted when fixed first holding member of deposition and second holding member Burr is grown into part, and the burr is abutted with second holding member.
12. power steering gear as claimed in claim 9, which is characterized in that
First holding member and second holding member are formed as circular or circle in a manner of surrounding the rotary shaft Arcuation,
It is described recessed when the radiation direction of the rotary shaft being set as radial and by being set as circumferential around the direction of the rotary shaft Portion and the protrusion have the part extended from the radial inside towards outside and along the parts of the circumferentially extending.
13. power steering gear as claimed in claim 9, which is characterized in that
The wall portion has the inclined rake in a manner of increasing opening area towards the opening edge side from the bottom.
14. power steering gear as claimed in claim 9, which is characterized in that
The bottom is formed as planar,
When the direction rectangular relative to the plane of the bottom is set as datum axis, the protrusion is melted with ratio Portion, which is formed as prominent along the direction of the datum axis, and is formed as, before melting in the state of, phase It is substantially certain in the prescribed limit in the direction of the datum axis for the right angle orientation sectional area of the datum axis.
15. a kind of fixed structure comprising:
It is kept component, is formed by metal material；
Holding member is formed by thermoplastic resin, has the first holding member and the second holding member, is utilizing described first Be kept in the state of component described in holding member and second holding member clamping by first holding member with it is described Deposition is fixed to be kept component described in holding each other for second holding member；
The side opposed with second holding member of first holding member is arranged in recess portion, with towards described The mode of two holding member side openings forms and has bottom；
Wall portion, the opening edge along the recess portion are arranged, and are formed as described in the distance between itself and second holding member ratio Bottom is short with the distance between second holding member and does not abut with second holding member；
Protrusion, by it is opposed with the recess portion and towards the recess portion side it is outstanding in a manner of be set to second maintaining part Part is melted in the state of abutting in its front end with the bottom and keeps first holding member and described second Component deposition；
For second holding member, the distance between the bottom and second holding member are arranged to, The one of the protrusion or the bottom melted when fixed first holding member of deposition and second holding member Burr is grown into part, and the burr is abutted with second holding member.
16. fixed structure as claimed in claim 15, which is characterized in that
The wall portion has the inclined rake in a manner of increasing opening area towards the opening edge side from the bottom.
17. fixed structure as claimed in claim 15, which is characterized in that
The bottom is formed as planar,
When the direction rectangular relative to the plane of the bottom is set as datum axis, the protrusion is melted with ratio Portion, which is formed as prominent along the direction of the datum axis, and is formed as, before melting in the state of, phase It is substantially certain in the prescribed limit in the direction of the datum axis for the right angle orientation sectional area of the datum axis.
CN201580036669.9A 2014-07-09 2015-06-25 Rotary angle detecting device and power steering gear Active CN106471347B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2014-141097 2014-07-09
JP2014141097 2014-07-09
PCT/JP2015/068317 WO2016006461A1 (en) 2014-07-09 2015-06-25 Rotation angle detection device and power steering device

Publications (2)

Publication Number Publication Date
CN106471347A CN106471347A (en) 2017-03-01
CN106471347B true CN106471347B (en) 2019-03-05

Family

ID=55064099

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580036669.9A Active CN106471347B (en) 2014-07-09 2015-06-25 Rotary angle detecting device and power steering gear

Country Status (6)

Country Link
US (1) US10207733B2 (en)
JP (1) JP6291682B2 (en)
KR (1) KR20170015463A (en)
CN (1) CN106471347B (en)
DE (1) DE112015003183B4 (en)
WO (1) WO2016006461A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6278050B2 (en) * 2016-03-11 2018-02-14 Tdk株式会社 Rotation angle detection device and rotary machine device
JP2018059740A (en) * 2016-10-03 2018-04-12 Ｋｙｂ株式会社 Torque sensor
CN106809212A (en) * 2017-03-30 2017-06-09 福建船政交通职业学院 One kind is blown out vehicle body stabilizing control system
US11378473B2 (en) * 2017-04-17 2022-07-05 Lord Corp Methods and systems for measuring parameters of rotating shafts and couplings
CN108116476B (en) * 2017-12-30 2019-01-04 曹胜伟 A kind of motor power transfer
US11052937B2 (en) * 2018-01-19 2021-07-06 Steering Solutions Ip Holding Corporation Splined component assembly and method
CN111820819B (en) * 2019-04-20 2022-09-23 青岛塔波尔机器人技术股份有限公司 Steering auxiliary assembly, cleaning equipment and steering control method of cleaning equipment
CN110356473A (en) * 2019-07-24 2019-10-22 重庆长安汽车股份有限公司 A kind of vehicle redundancy rotation angular sensing system
CN110763385B (en) * 2019-11-19 2021-02-12 重庆前卫科技集团有限公司 Torque detection mechanism of direct transmission set

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3157431B2 (en) * 1995-08-14 2001-04-16 三洋電機株式会社 Small motor
CN1727859A (en) * 2004-07-29 2006-02-01 光洋精工株式会社 Torque detecting apparatus and electric power steering apparatus
CN101836097B (en) * 2007-09-10 2012-06-13 Lg伊诺特有限公司 Stator assembly and torque measuring device
CN103241289A (en) * 2012-02-01 2013-08-14 株式会社捷太格特 Torque detection device and electric power steering system including the same
CN103287492A (en) * 2012-02-28 2013-09-11 株式会社捷太格特 Torque detection device, method of manufacturing torque detection device, and electric power steering system
CN103661595A (en) * 2012-09-14 2014-03-26 日立汽车系统转向器株式会社 Torque sensor and power steering system using the torque sensor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54144990A (en) * 1978-05-04 1979-11-12 Hitachi Ltd Impact detector
JP2004093183A (en) 2002-08-29 2004-03-25 Unisia Jkc Steering System Co Ltd Torque sensor for electric power steering
JP2004135402A (en) * 2002-10-09 2004-04-30 Tamagawa Seiki Co Ltd Structure of stator for rotation detector
DE10316124A1 (en) * 2003-04-04 2004-10-28 Valeo Schalter Und Sensoren Gmbh Device for determining a torque exerted on a shaft
EP1706716B1 (en) * 2004-01-20 2011-09-14 Valeo Schalter und Sensoren GmbH Device for determining a steering angle and a torque that is exerted on a steering shaft
JP4783012B2 (en) * 2004-12-28 2011-09-28 日立オートモティブシステムズ株式会社 Electric power steering motor and manufacturing method thereof
JP2008180518A (en) 2007-01-23 2008-08-07 Nsk Ltd Torque sensor
JP5440754B2 (en) * 2008-04-10 2014-03-12 日本精工株式会社 Torque detector, electric power steering apparatus, and method of manufacturing torque detector
JP2009273195A (en) 2008-04-30 2009-11-19 Tamagawa Seiki Co Ltd Resolver stator structure
DE102012021137A1 (en) * 2012-10-27 2014-04-30 Valeo Schalter Und Sensoren Gmbh Sensor device for a motor vehicle, motor vehicle and method for creating a sensor device
JP5864466B2 (en) * 2013-03-22 2016-02-17 日立オートモティブシステムズステアリング株式会社 Rotation detection device and power steering device
JP5698397B2 (en) 2014-03-13 2015-04-08 株式会社ブリヂストン Jig for pattern block machining in sector mold

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3157431B2 (en) * 1995-08-14 2001-04-16 三洋電機株式会社 Small motor
CN1727859A (en) * 2004-07-29 2006-02-01 光洋精工株式会社 Torque detecting apparatus and electric power steering apparatus
CN101836097B (en) * 2007-09-10 2012-06-13 Lg伊诺特有限公司 Stator assembly and torque measuring device
CN103241289A (en) * 2012-02-01 2013-08-14 株式会社捷太格特 Torque detection device and electric power steering system including the same
CN103287492A (en) * 2012-02-28 2013-09-11 株式会社捷太格特 Torque detection device, method of manufacturing torque detection device, and electric power steering system
CN103661595A (en) * 2012-09-14 2014-03-26 日立汽车系统转向器株式会社 Torque sensor and power steering system using the torque sensor

Also Published As

Publication number Publication date
US20170129532A1 (en) 2017-05-11
JPWO2016006461A1 (en) 2017-07-20
JP6291682B2 (en) 2018-03-14
KR20170015463A (en) 2017-02-08
DE112015003183T5 (en) 2017-03-23
US10207733B2 (en) 2019-02-19
WO2016006461A1 (en) 2016-01-14
CN106471347A (en) 2017-03-01
DE112015003183B4 (en) 2024-03-21

Similar Documents

Publication Publication Date Title
CN106471347B (en) Rotary angle detecting device and power steering gear
US9505431B2 (en) Rotation detection device and power steering device
EP3050778B1 (en) Torque sensor
US7602173B2 (en) Sensor system for detecting a differential angle
EP2501603B1 (en) Apparatus for detecting steering torque and steering angle and steering system having the same
US20160332665A1 (en) Apparatus for Detecting Torque and Steering System Having the Same
US9459165B2 (en) Sensor unit, torque detector, and electric power steering device
EP2107355A2 (en) Magnetic torque sensor
JP6144459B2 (en) Electric power steering device
CN107336790B (en) Driving unit and electrically assisted bicycle
JP6214444B2 (en) Stator unit, torque detection device, electric power steering device, and stator unit manufacturing method
EP2088398A1 (en) Rotation angle detector
JP6268442B2 (en) Torque sensor and electric power steering device
JP5852484B2 (en) Torque sensor
KR101992277B1 (en) Torque Sensor
JP6515760B2 (en) Rotation angle detection device
JP2009092463A (en) Torque detection apparatus, its manufacturing method, and electric power steering system
JP2018020453A (en) Insert molding method, insert molded article, torque detection device and electrically driven power steering device
JP5994263B2 (en) Torque detection device and manufacturing method thereof
JP5998772B2 (en) Rotating machine with sensor device and physical quantity measuring device
JP7144740B2 (en) Magnetic collecting ring and torque detector
WO2024121996A1 (en) Torque sensor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210518

Address after: Ibaraki

Patentee after: Hitachi astemo Co.,Ltd.

Address before: Ibaraki

Patentee before: HITACHI AUTOMOTIVE SYSTEMS, Ltd.